Lock



March 12, 1935. G. KEBORT LOCK Filed Nov. 50, 1932 2 sheets-Shea 1 5 IN VEN TOR.

A TTORNEYS.

March 12, .1935. G. KEBORT 1,994,104

LOCK

Filed ,Nov. 30, 1932 2 Sheets$heet 2 INVENTOR.

A TTORNEYS.

Patented Mar. 12,1935

UNITED stares earsnrorricsf The present invention is designed to provide a lock which may be readily set with relation to the knobs of a lock for ordinary, or normal use, and which may be also set so as to disconnect the mechanism in amanner to prevent operating the latch bolt of the look from the outer knob and also to respond with an alarm upon the operation of the upper knob when the device is set for that purpose. Features and details of the invention will appear from the specification and claims.

A preferred embodiment of the invention is illustrated in theaccompanying drawings as follows:-

Fig. 1 shows an elevation of the device, partly in section.

Fig. 2 an 'end view of the mechanism with the outer shell of the knob removed.

Fig. 3 a section on the line 33 in Fig. 1.

Fig. 4 a perspective View of the locking disc.

Fig. 5 an elevation showing the switch.

Fig. 6 an elevation of a fragment of a door and case.

Fig. 7 a section on the line 7-7 in-Fig. 6.

1 marks the door, 2 the usual lock mechanism having a latch bolt 3 and usual roll back 4 for actuating the latch bolt.

A channel-shaped rod 5 operates the roll back 4 and extends substantially through the door.

An outer knob 6 is mounted on a squared end. 7 of a pin 8. The pin 8 through the major portion of its length is round and is located in the channel of the rod 5. A locking disc 9 having a squared opening 10 is mounted on the inner end of the rod 5 and, therefore, locked therewith. An inner knob 11 carries a latch 12, the latch being mounted on a pin 13 between ears 14 car,- ried in the inner part of the knob. The latch has a handle 15 by means of which it can be readily thrown into and out of position to engage a notch 10a in the disc 10. A link 16 is pivotally mounted at 17 on the latch and extends through a notch 18 in a plate 19, the plate being mounted on an extension 20 of the rod 5 and secured by nut 21. A spring 22 is arranged on the link and the link is so positioned between the latch and the plate 19 that as the latch is swung the link is thrown past center and consequently through the action of the spring holds the latch out of engagement, or into engagement as it may be set.

A cross arm 23 engages a squaredend 24 of the pin 8 and the cross arm is secured by screws 23a to the knob 11. Consequently the outer and inner knobs are at all times locked together. The

knob 11 is journaled on a bushing 25 which is mounted on the rod 5.

In the operation of the device when it is desired to have the lock operate as normally, the latch 12 isthrown into the notch 10a, thus locking the knob through the disc with the rod 5 and consequently with the operation of either knob the latch bolt 3 is operated. When it is desired to make the outer knob inoperative the latch 12 is .merely thrown out of engagement with the disc and under these conditions the inner knob is simply turned without communicating the movement to the rod 5 and in consequence to the latch bolt 3.

It is desirable to provide the device also with an alarm. This is provided in the present mechanism as follows: A carrier 26 has an extension 27 which is rotatively mounted in a cover plate 28. This carrier has notches 29 which are adapted to be engaged by ears 30 on the inner handle 11 so that this carrier is turned with the handle 11. A bridge plate 31 is mounted on an insulating block 31a and the insulating block is mounted on the carrier 26 so that the switch plate 31 responds to the turning movement of the knob.

Contact plates 32 are adapted to be bridged by the plate 31 and these have posts 32a to which wires 33 are connected. The wires 33 lead to contact plates 34 on the door, which plates communicate with plates 35. The plates 35 engage a spring contact 36 which is carried by a stem 3'1. The stem 37 is mounted in a sleeve 38 and a spring 39 urges the plate toward the door. Wires 41 are connected to the stem 3'? by a screw 40, the screw 40 alsoforming a stop limiting the movement of the contact. The wires 41 lead to an alarm 42. When the knob is unlatched from the rod 5 it can be turned to put the switch plate 31 over one of the contacts so that with further turning of the knob the switch will be closed and the alarm set in operation. Therefore, any one tampering with the'outer knob will not succeed in operating the latch bolt, but on the other hand will cause the alarm. In normal use the plate 31 is turned 180 from the contacts and the latch locking the knob 11 with the rod 5 limits the position of the knobs and consequently prevents an alarm during the normal operation of the device. i

What I claim as new is:- g

1. In a lock, the combination of a latch bolt mechanism; a rotative actuating rod operating the mechanism through its rotation; an outer knob; an inner knob means connecting and locking one knob with the other; and a manually detachable connection between the inner knob and the rod.

2. In a lock, the combination of a latch bolt mechanism; a rotative actuating rod operating the mechanism; an outer knob; an inner knob means connecting and locking one knob with the other; and a latch between the inner knob and the rod.

3. In a lock, the combination of a latch bolt mechanism; a channel-shaped rod operating the mechanismthrough its rotation; an outer knob; a pin extending from the outer knob along the channel of the rod toward the inner end of the rod; and a manually detachable connection operable from inside the lock between the pin and rod. Y

4. In a lock, the combination of a latch bolt mechanism; a channel-shaped rod operating the mechanism; an outer knob; a pin extending from the outer knob along the channel of the rod; an inner knob locked with the pin; a catch on the rod; and a latch on the inner knob manually operable to throw the latch into and out of engagement with the catch.

5. In a lock, the combination of a latch bolt mechanism; a channel-shaped rod operating the mechanism; an outer knob; a pin extending from the outer knob along the channel of the rod; an inner knob locked with the pin; a catch on the rod; a latch on the inner knob manually operable to throw the latch into and out of engagementwith the catch; and yielding means holding the latch in its inner, or outer position.

6. In a lock, the combination or" a latch bolt mechanism; a channel-formed rod operating the mechanism; an outer knob; a pin extending from the outer knob through the channel of the rod; an inner knob; a connection between the inner knob and the pin; a notched disc locked on the rod; and a latch on the inner knob operating on the notched disc.

GEORGE KEBOR'I. 

